<?php

/*
 * This file is part of PHP CS Fixer.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *     Dariusz Rumiński <dariusz.ruminski@gmail.com>
 *
 * This source file is subject to the MIT license that is bundled
 * with this source code in the file LICENSE.
 */

namespace PhpCsFixer\Fixer\Whitespace;

use PhpCsFixer\AbstractFixer;
use PhpCsFixer\FixerDefinition\CodeSample;
use PhpCsFixer\FixerDefinition\FixerDefinition;
use PhpCsFixer\Tokenizer\Token;
use PhpCsFixer\Tokenizer\Tokens;

/**
 * Fixer for rules defined in PSR2 ¶4.3, ¶4.6, ¶5.
 *
 * @author Marc Aubé
 * @author Dariusz Rumiński <dariusz.ruminski@gmail.com>
 */
final class NoSpacesInsideParenthesisFixer extends AbstractFixer
{
    /**
     * {@inheritdoc}
     */
    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        foreach ($tokens as $index => $token) {
            if (!$token->equals('(')) {
                continue;
            }

            $prevIndex = $tokens->getPrevMeaningfulToken($index);

            // ignore parenthesis for T_ARRAY
            if (null !== $prevIndex && $tokens[$prevIndex]->isGivenKind(T_ARRAY)) {
                continue;
            }

            $endIndex = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $index);

            // remove space after opening `(`
            $this->removeSpaceAroundToken($tokens[$index + 1]);

            // remove space before closing `)` if it is not `list($a, $b, )` case
            if (!$tokens[$tokens->getPrevMeaningfulToken($endIndex)]->equals(',')) {
                $this->removeSpaceAroundToken($tokens[$endIndex - 1]);
            }
        }
    }

    /**
     * {@inheritdoc}
     */
    public function getDefinition()
    {
        return new FixerDefinition(
            'There MUST NOT be a space after the opening parenthesis. There MUST NOT be a space before the closing parenthesis.',
            array(
                new CodeSample("<?php\nif ( \$a ) {\n    foo( );\n}"),
                new CodeSample('<?php
function foo( $bar, $baz )
{
}'
                ),
            )
        );
    }

    /**
     * {@inheritdoc}
     */
    public function isCandidate(Tokens $tokens)
    {
        return $tokens->isTokenKindFound('(');
    }

    /**
     * Remove spaces from token at a given index.
     *
     * @param Token $token
     */
    private function removeSpaceAroundToken(Token $token)
    {
        if ($token->isWhitespace() && false === strpos($token->getContent(), "\n")) {
            $token->clear();
        }
    }
}
